Clinton, I think good writing and somebody's personal enjoyment sure have something in common if we're talking about reading for pleasure. Someone who combines words skillfully with no reader at all in mind is verbally masturbating. There are plenty of good authors I don't like, but somebody does. There are also bad writers I enjoy because I can still see what's behind the writing even if the author can't express it well.

Perhaps it's the ability of the author to create the desired effect upon the reader that's the most important. In the original question - "What makes good writing to YOU?" - my personal enjoyment of the writing is what makes it good. I'd also agree with Peter T. It's like music. You can just listen and enjoy, or step back in awe at what the musician did to make it sound like THAT. I could be oversimilefying here...